摘要
采用复合制导体制的防空导弹 ,在其末制导阶段下视攻击低空目标时 ,主动导引头会接收到较强的地/海杂波。杂波对主动导引头的性能影响很大 ,为了评估杂波对导引头的作用 ,必须计算地 /海杂波的谱密度。对于使用高脉冲重复频率的主动多普勒雷达导引头 ,连续波近似法不仅计算相对简单 ,而且可以给出较高的计算精度。但该方法在计算高度杂波时 ,误差较大 ,在计算出的杂波谱图上仅能得到主瓣杂波和旁瓣杂波 ,无法看出高度杂波的形状 ,高度杂波实际上成为旁瓣杂波。提出了一种改进的连续波近似方法 ,它提高了高度杂波的计算准确度 ,对旁瓣杂波的计算亦有改善。
A composite guidance homing missile would receive strong ground/sea clutters when the seeker tracks down a lower altitude target. The clutter has a great effect on the homing seeker, so spectrum density of ground/sea clutter should be calculated in order to estimate the clutter′s effect on the seeker. For a Doppler radar homing seeker with high pulse repetition frequency, the continuous wave approximation is not only simple, but also has a high calculation accuracy. However, this method has a high error rate in calculating altitude clutters. The altitude clutter in the clutter spectrum can not be obtained. An improved continuous wave approximation which can improve both the calculation accuracy of altitude clutters, and accuracy of sidelobe clutters.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2003年第10期1209-1211,共3页
Systems Engineering and Electronics
